Grade 8 Illustrative Mathematics – Unit 4: Linear Equations and Linear Systems 

Lesson Topic 
IM Lesson 
Khan Academy Support Videos 
Khan Academy Online Practice 
Class Notes 
Lesson Summary & Homework Help 
Lesson 1 – Number Puzzles 




Lesson 2 – Keeping the Equation Balanced 




Lesson 3 –Balanced Moves 
Intro to Equations with variables on both sides



Lesson 4 – More Balanced Moves 


Lesson 5 – Solving Any Linear Equation 




Lesson 6 – Strategic Solving 

Equations with variables on both sides: decimals and fractions



Extra Practice Linear Equations 

Equation practice with vertical angles
Equation practice with complementary angles

Equation practice with vertical angles



Lesson 7 – All, Some, or No Solutions 
Creating an equation with no solutions



Lesson 8 – How Many Solutions 
Number of solutions to equations



Lesson 9 – When Are They the Same 
Age word problem: Ben and William




Lesson 10 – On or Off the Line? 




Lesson 11 – On Both of the Lines 





Lesson 12 – Systems of Equations 
Systems of equations: trolls, tolls (1 of 2)
Systems of equations: trolls, tolls (2 of 2)
Systems of equations with graphing

Systems of equations with graphing




Lesson 13 – Solving Systems of Equations 
Systems of equations with substitution: y=1/4x+100 and y=1/4x+120




Lesson 14 – Solving More Systems 
Systems of equations with substitution – 1
Systems of equations with substitution – 2

Systems of equations with substitution



Lesson 15 – Writing Systems of Equations 





Lesson 16 – Solving Problems with Systems of Equations 
Systems of equations with word problems: no solution



Unit 4 Review 



